(23)Relevant competent authorities should receive in a timely manner via the notification portal the prospectus and accompanying data, together with a certificate of approval that states that the prospectus has been drawn up in accordance with Regulation (EU) 2017/1129. ESMA should ensure that the notification portal preserves the security and integrity of the information exchanged between competent authorities. Competent authorities remain responsible for the submission of such information. In order to enable a smoothly and timely operation of the notification portal, it is necessary to specify the accompanying data that is to be uploaded to that notification portal.